IV.PO.13 NEW METALLO-PORPHYRINS -CHARACTERIZATION AND APPLICATIONS IN SOLAR ENERGY CONVERSIONL. Olteanu1, R. M. Ion2,3, S. Teodorescu1 , R. M. Şirbescu1, I. D. Dulamă1, A. I. Bucurică1 1
Valahia University of Targoviste, Institute of Multidisciplinary Research for Science and Technology, 130004, Targoviste, Romania, e-mail:
[email protected] 2 Valahia University of Targoviste, Materials Engineering and Mechanics Department, 130004, Targoviste, Romania 3 National Institute for Research and Development in Chemistry and Petrochemistry - ICECHIM, Nanomedicine Research Group, 060021, Bucharest, Romania
Keywords: Porphyrins, FT-IR, RAMAN, UV-VIS, SEM, AFM Abstract: Tetrapyrrole macrocycles play important roles that serve nature in various ways to energy conversion. Under such context, the tetra-aryl porphyrins derivatives with silicon, are known as one of the most efficient sensitizers in solar energy conversion. The investigations of spectral properties of the metallic complexes of 5,10,15,20-p-tetra-phenyl porphyrins, are achieved by: UV-VIS, FT-IR and RAMAN analysis. The surface morphology of the samples was probed by the atomic force microscope (AFM) and scanning electron microscopy (SEM). Spectral properties (absorption, fluorescence and excited-state lifetimes) of the studied porphyrins indicate that these materials could be perspective for potential photochemical applications. In the work presented herein, porphyrin have widely-varied properties strongly linked to the central metal and axial ligand, proper for solar energy applications. Because they have high visible light absorption and stable physical properties, the tetra-aryl porphyrin derivatives were examined in conjunction with wide-bandgap semiconductive oxides TiO2 and SnO2. The molecules exhibit strong absorption in the visible and near-infrared spectral regions as well as interesting photophysical properties suggesting possible applications in light harvesting. References 1. A. Chilian, O.R. Bancuta, I. Bancuta, R.M. Ion, R. Setnescu, T. Setnescu, A. Gheboianu, V. Marinescu, C. Radulescu, Characterization Of ZnO And SNO2:F Materials By SEM For Their Use in the manufacture of DSSC, Rev. Roum. Chim., 2015, 60(5-6), 549-554 2. D. Wróbel, J. Goc, R.M.Ion, Photovoltaic and spectral properties of tetraphenyloporphyrin and metallotetraphenyloporphyrin dyes. Journal of Molecular Structure, (1998), 450(1-3), 239-246.
Acknowledgements: We hereby acknowledge the structural founds project ICSTM (POS-CCE, O.2.2.1., ID 916, SMIS 14687, ctr. No 250/28.09.2010) for providing the infrastructure used in this work.
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